Improvement in saw-mill head-blocks



A. S. RIOHARDS.. Saw-Mill Head-Block.

No. 20 l,|99. Patented March 12, 1878.

N. PETERS, PHOTD-LITHOGRAPHER. WASH NGTON, D. Q

UN -rED'SrA'rns- PATENT OFFICE.

ALFVRFDI s. RICHARDS-,7 ()F GRAND RAPIDS, MICHIGAN.

IM PROVEMFENTH m ISAWZ-MILL HEAD-BLOCKS.

Specification forming part of Letters Patent No. 201,199, dated March12, 1878; application filed November 1, 1877.

To all whom itmay concern:

Be it known that I, ALFRED S. RICHARDS,

of the city of Grand Rapids, county-of Kent,

and State of Michigan, have invented a new" and useful Improvement inSet-Works for Sawf Mills, of which the following is a fullspecification, reference beinghad to the accompanying drawings, inwhich-- r .1

Figure 1 is -a top or' plan view of my. im-

proved machine; Fig. 2,-a transverse section of the same. Figs.3,4,- and5 are detail views.

My invention relates to the construction of a set-work for saw-millswhich may be worked either by hand or by means of an incline so arrangedthat the knees may be moved upon the head-blocks independently of thesettingshaft and of each other, and so that one knee may be set inadvance of the other any-res quired distance, and thenmoved simultane'ously; and that the-log can be set forward;

with one movement of. a lever, either forward or backward, or bothforward and backward.

In the drawing, in each of the figures, like letters represent likeparts. i

B B are loose pinions geared to knees K upon head-block, for the purposeof moving knees K forward to set the log, which pinions B B are notchedto fit notches in clutchesAA. A A are clutches revolving with shaft S,but so arranged, by means of feather-keys or similar device, as to slidelongitudinally upon shaft S when being thrown in and out of gear, asthey may be, by means of trips 0 O. G C are trips for throwing clutchesA A out of gear with pinions B B, when it is desired to move knees K Keither backward or forward (as they may be moved) independently of theset- Works or of each other. a a are spiral springs surrounding shaft S,for the purpose of throwing clutches A A in gear with pinions B B. D Dare ratchet-wheels solid on shaft S, and which, when revolved, will alsorevolve shaft S. E E are pawls for revolving ratchetsD D- E forrevolving ratchet D, and E for revolving ratchet D. F F are bevel-gearsattached to pawls E E, and working them upon ratchets D D in such amanner that ratchets D D are made to revolve forward no matter which waythe bevel-gears F F are worked. J is a pinion geared between bevel-gearsF F, so as to transfer the power and reverse it from one bevel-gear tothe other, and consequently'from jonepawl to the other, and thus fromone ratchet to the other, so that no matter which way the bevel-gearsare worked, the power being thus transferred, the ratchets D D and shaftS must all the time havea forward revolution, and consequently knee Kmust continually move forward when clutches A A are in gear withpinions-B B. H H are levers to operate: .the set-works, and areattached, lever H to bevel-gear F, and lever H to bevel-gear F. Lever His used when it desired toset by hand, and lever His operated by doubleincline I when it is desired to set automatically. I I is a doubleincline, differing from the ordinary incline used for setting purposesin this,

that the single incline is formed in onepiece,

and would only set as the lever H moved in i one direction, whilemydouble incline is formed in two pieces, I I, Fig. l, with space 00between to guide lever H and will, in connection with my settingapparatus, set either way the lever H may be moved, whether up or downthe incline;--butFig.-3 more accurately represents my double incline,which, instead of consisting of two inclines, I I, and a space betweenthem, as shown in Fig. 1, consists of a single piece, I, with groove Xfor guiding lever H, as seen in Fig. 3.

Fig.0 represents a modification of my grooved incline, and which is madein two sections, I I, hinged or pivoted together, whereby a properentrance can always be obtained for the ready insertion of lever H inthe groove of the incline, said hinged section I also forming a supportfor the horizontal section I of the incline.

When, for any reason, more power is required for setting than can beobtained by use of levers H or H, acting upon bevelgears F F, as abovedescribed, an adjustable lever or similar device, or a ratchet and'pawl,may be used upon shaft P, which, being worked to right and left, or toright or left, will, through pinion J, acting upon bevel-gears F F, movethe settingworks with great power.

The operation of the above-described inven tion is as follows: Suppose alog to have been finished, it is now desired to recede knees K K. Thisis done by placing the foot on trips 0 O, which throws clutches A A outof gear,

1 when knees K are freeito be moved, The log "is placed n pon" the head-bloeks: infront of;

knees K K; :11. it isrlesiredto move one knee K in advance of the other,to divide the taper a of the logthis may be doneibysetting the V afootupon one of tripsG, and :advaneingthe.

otherknee by means of setting works, or the;

one'out'of. gear by hand The log being in 5 place, it maybe set to sawany thickness, from the one-sixty fonrth of: one inch up to andincluding fonrinches, by'one movement of lever H or E, If lever H bemoved forward, it car-2 'ries with it bevelgear .F and pawl :E, therebyrevolvin g ratchet D and setting the lo g at the V 'sametime by means ofpinion J; V The motion 7 51s reversednpon bevel-gear E, which moveshackward, carrying with. it-p'awl E. It's lever H be moved backward,bevel-gear 1 His movedba'ckward and carries with itpawl E At'the sametime the motion isreversed; as;

:before andz bevel-gear EE is moved forward;

- carryingpawl: E i which revolves rateheti .D

and sets the log, as before; lever H? be used;

(by; meansof double incline 1, the same rer salts are obtained,theprocesses being reversed. 1 'With the above-described combination,the

followingzresnlts are obtained Uniform thick-1 j ness: of lumberat one.down .or up stroke of the lever from one-siXty-fonrth of an inch to l'ansd including four inches. Both ends of the V I log will be advanced;the same. distance.= :The

pawls will not'slip, nor will more thantwo be reqniredyand' therebyasaving: of over one-r half the time required byany other process:

l .Willbe accomplished;

:By means of my doable incline, these set-:

works may be made self-setting, and by the movement of lever H up in thegroove of the double incline one-half of the required set is made, and.by the return of the lever the set is completed, thereby accomplishingthe rea log of greaterzdiameteriat one end than the aother can be sawedwith greater economy of the: diameters of the ends of the legend givesawing the, log across the grain w toialmos't any reasonable tapenz ltially as speeified;

constructed and relatively arranged tooperscribed. r r r herein shownand described. 7 1 r n Witnesses EDWIN A. BURLINGAMIE,

PETER L. BURLINGAlVIE.

lumber by shifting the clutch out of the pin r 7 ion, undertheknee,againstwhiohthe larger. end of the log restsgandby a movement ofV lever H advancing the smaller: end: in; such a V a r manner as todivide thedifierence between i an; equal amountof taper to each slab,thus 7 i iii 1 avoiding, to the; greatest extent practieable, I

In=the samemannerlnmhermaybe sawed" 71 ALFRED s. RICHARDS.

I qniredi set with but one-half the angle neoes F sary to set by theordinary single incline. I 7 V 3 By the use of the loosepinions.andclntches,

I claim as my: invention anddesireiaat {i I Theeombinatiomwiththehead-blocks, of; V n is V the knees K having racks in their nndersides,1 1 V pinions; l3 EB, shaft 8, having elntehesA A, beveLgearsEE,pini0-I1J,.1 %lt hets and perils: V D135 "F Fgaml'levers H E,theseveralparts Z r:

ate substantially as herein shown and de- 3; The combination, with theset-Work 1nech- 7 r r V V 7 'anism of the lever Hfiand: movable groovedineline 1,: substantially as and for thepnrpose;

